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<h2><span class="refentrytitle">Function BOOST_UNITS_PHYSICAL_CONSTANT</span></h2>
<p>boost::units::si::constants::codata::BOOST_UNITS_PHYSICAL_CONSTANT &#8212; CODATA recommended values of the fundamental physical constants: NIST SP 961. </p>
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<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="../../../../../boost_units/Reference.html#header.boost.units.systems.si.codata.atomic-nuclear_constants_hpp" title="Header &lt;boost/units/systems/si/codata/atomic-nuclear_constants.hpp&gt;">boost/units/systems/si/codata/atomic-nuclear_constants.hpp</a>&gt;

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 <span class="identifier">BOOST_UNITS_PHYSICAL_CONSTANT</span><span class="special">(</span><span class="identifier">alpha</span><span class="special">,</span> <span class="identifier">quantity</span><span class="special">&lt;</span> <span class="identifier">dimensionless</span> <span class="special">&gt;</span><span class="special">,</span> 
                               <span class="number">7</span><span class="special">.</span><span class="number">2973525376e</span><span class="special">-</span><span class="number">3</span> <span class="special">*</span> dimensionless<span class="special">,</span> 
                               <span class="number">5</span><span class="special">.</span><span class="number">0e</span><span class="special">-</span><span class="number">12</span> <span class="special">*</span> dimensionless<span class="special">)</span><span class="special">;</span></pre></div>
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<a name="idp190163712"></a><h2>Description</h2>
<p>fine structure constant </p>
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<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2008 Matthias Christian Schabel<br>Copyright &#169; 2007-2010 Steven
      Watanabe<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
      </p>
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